66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
//===-- Utility class to test fixed-point round -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "test/UnitTest/Test.h"
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#include "src/__support/fixed_point/fx_rep.h"
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template <typename T> class RoundTest : public LIBC_NAMESPACE::testing::Test {
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using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<T>;
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static constexpr T zero = FXRep::ZERO();
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static constexpr T min = FXRep::MIN();
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static constexpr T max = FXRep::MAX();
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static constexpr T half = static_cast<T>(0.5);
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static constexpr T neg_half = static_cast<T>(-0.5);
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static constexpr T one =
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(FXRep::INTEGRAL_LEN > 0) ? static_cast<T>(1) : FXRep::MAX();
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static constexpr T neg_one = static_cast<T>(-1);
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static constexpr T eps = FXRep::EPS();
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public:
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typedef T (*RoundFunc)(T, int);
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void testSpecialNumbers(RoundFunc func) {
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EXPECT_EQ(zero, func(zero, FXRep::FRACTION_LEN - 5));
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EXPECT_EQ(min, func(min, 0));
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EXPECT_EQ(max, func(max, FXRep::FRACTION_LEN));
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EXPECT_EQ(one, func(half, 0));
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EXPECT_EQ(half, func(half, 1));
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EXPECT_EQ(half, func(half, FXRep::FRACTION_LEN));
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EXPECT_EQ(one, func(half + eps, 0));
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EXPECT_EQ(half, func(half + eps, 1));
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EXPECT_EQ(half, func(half + eps, 2));
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EXPECT_EQ(zero, func(half - eps, 0));
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EXPECT_EQ(half, func(half - eps, 1));
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EXPECT_EQ(half, func(half - eps, 2));
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EXPECT_EQ(eps, func(eps, FXRep::FRACTION_LEN + 10));
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EXPECT_EQ(eps << 1, func(eps, FXRep::FRACTION_LEN - 1));
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EXPECT_EQ(zero, func(eps, FXRep::FRACTION_LEN - 2));
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if constexpr (FXRep::SIGN_LEN) {
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EXPECT_EQ(zero, func(neg_half, 0));
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EXPECT_EQ(neg_half, func(neg_half, 1));
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EXPECT_EQ(neg_half, func(neg_half, 3));
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EXPECT_EQ(zero, func(neg_half + eps, 0));
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EXPECT_EQ(neg_half, func(neg_half + eps, 1));
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EXPECT_EQ(neg_half, func(neg_half + eps, 2));
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EXPECT_EQ(neg_one, func(neg_half - eps, 0));
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EXPECT_EQ(neg_half, func(neg_half - eps, 1));
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EXPECT_EQ(neg_half, func(neg_half - eps, 2));
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EXPECT_EQ(-eps, func(-eps, FXRep::FRACTION_LEN + 10));
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}
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}
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};
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#define LIST_ROUND_TESTS(T, func) \
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using LlvmLibcRoundTest = RoundTest<T>; \
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TEST_F(LlvmLibcRoundTest, SpecialNumbers) { testSpecialNumbers(&func); } \
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static_assert(true, "Require semicolon.")
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